Method of coating tubes using a self-assembly process
a tubular structure and self-assembly technology, applied in the field of self-assembly process of tubular structure coating, can solve the problems of slow coating rate, difficult control of coating thickness, and limited practical application of most of these methods
Inactive Publication Date: 2013-03-05
CORNING INC
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Benefits of technology
The invention is about a method to create a thin film coating on a tubular workpiece. The method involves immersing the workpiece in a liquid and using a delivery tube to create a monolayer of coating particles on the liquid surface. These particles are then transferred to the workpiece to form a coating on the inside. The particles can be nanoparticles or larger. This method provides a simple and efficient way to create thin film coatings on tubular workpieces.
Problems solved by technology
However, most of these methods are limited in practical applications by small sample sizes, slow coating rates, difficulty in controlling coating thickness, and / or the need for complex equipment.
In addition to the above-mentioned shortcomings, most known methods are generally limited to thin film formation on a flat plate or outer surface of a tube or fiber.
Method used
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[0011]As used herein, the singular forms “a,”“an” and “the” include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to “a suspension” includes examples having two or more such “suspensions” unless the context clearly indicates otherwise.
[0012]Ranges can be expressed herein as from “about” one particular value, and / or to “about” another particular value. When such a range is expressed, examples include from the one particular value and / or to the other particular value. Similarly, when values are expressed as approximations, by use of the antecedent “about,” it will be understood that the particular value forms another aspect. It will be further understood that the endpoints of each of the ranges are significant both in relation to the other endpoint, and independently of the other endpoint.
[0013]Unless otherwise expressly stated, it is in no way intended that any method set forth herein be construed as requiring that its steps be performed...
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Abstract
A method of coating an inner surface of a tubular workpiece includes immersing the tubular workpiece lengthwise into a liquid subphase, inserting a first end of a delivery tube into the tubular workpiece so as to bring a distal end surface of the delivery tube to within a predetermined distance from the liquid surface, dispensing a suspension of coating particles into the first delivery tube to form a monolayer of the coating particles on the liquid surface in an area of the liquid surface between the inner surface of the tubular workpiece and an outer surface of the first delivery tube, and withdrawing at least a portion of the tubular workpiece from the liquid subphase so as to form a coating of the coating particles on a portion of the inner surface of the workpiece.
Description
BACKGROUND AND SUMMARY[0001]The present invention relates generally to a method of coating tubular structures using a self-assembly process, and more specifically to a method of forming thin film coatings on inner surfaces of tubular structures.[0002]Thin film coatings comprising micro- and / or nanoscale particles are of technological interest. Such coatings can impart coated substrates new attributes and functionalities, including chemical, optical and electronic properties as well as surface texture. Example applications of such coated substrates include photonic crystals, small lasers formed in 2-D assembly of colloidal particles, films for tailoring surface conductivity on composite substrates for sensor applications, waveguides, coatings for modification of rheological properties, surface-enhanced Raman scattering (SERS) substrates, etc.[0003]A variety of different methods for assembling micro- and / or nanoscale particles into thin film coatings on solid substrates are known. For...
Claims
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IPC IPC(8): B05D7/22
CPCB01J37/0221B05D7/222B05D1/20B82Y30/00B82Y40/00B01J35/004B05D2401/32B05D7/52B01J35/39
Inventor BUCK, THOMAS LAVEELIU, JIAVENKATARAMAN, NATESAN
Owner CORNING INC